Tag Archives: GLC-T

GLC-T, GLC-TE and SFP-GE-T are three Cisco 1000BASE-T SFP types. All these three models SFPs can operate on standard Category 5 unshielded twisted-pair copper cabling of link lengths up to 100 m (328 ft) and support 10/100/1000 auto negotiation and Auto MDI/MDIX. So, what’s the difference between them? In this article, comparison between Cisco GLC-T vs GLC-TE vs SFP-GE-T will be provided.

Specifications for GLC-T, GLC-TE and SFP-GE-T

By access to Cisco’s relative information, specifications for Cisco GLC-T, GLC-TE and SFP-GE-T are concluded in the table below:

SFP Models

Description

Operating Temperature Range

Cisco GLC-T

1000BASE-T SFP Copper RJ-45 100m Transceiver

COM

Cisco GLC-TE

1000BASE-T SFP Copper RJ-45 100m Transceiver

EXT

Cisco SFP-GE-T

1000BASE-T SFP Copper RJ-45 100m Transceiver

NEBS 3 ESD EXT

From the table above, we can see that the difference between GLC-T and GLC-TE is the operating temperature range. Operating temperature range for GLC-T and GLC-TE is respectively commercial temperature range (COM) and Extended temperature range (EXT). The difference between SFP-GE-T and GLC-TE is that the SFP-GE-T has the function of NEBS 3 ESD. Then what does that mean? Let’s read the following passages.

Explanation for SFP Operating Temperature Range: COM, EXT and IND

Operating temperature range:

Commercial temperature range (COM): 0 to 70°C (32 to 158°F)

Extended temperature range (EXT): -5 to 85°C (23 to 185°F)

Industrial temperature range (IND): -40 to 85°C (-40 to 185°F)

Storage temperature range: -40 to 85°C (-40 to 185°F)

What Does NEBS 3 ESD Mean?

NEBS is short for Network Equipment Building System and is a set of standards for building networking equipment which can withstand a variety of environmental stresses. NEBS has three levels: Level 1, Level 2, and Level 3. Level 1 refers to cases where minimum compatibility with the environment is needed. Level 2 applies for limited operability of the product. Finally, NEBS Level 3 (NEBS 3 ESD) certification guarantees the maximum operability of the equipment. It also certifies that the equipment will perform well in harsh environmental conditions and will not interfere with other electronic devices around. NEBS Level 3 certified networking equipment is vital in mission-critical applications. SFP-GE-T with 1000BASE-T NEBS 3 ESD, that is to say, compared to GLC-T or GLC-TE it can take greater stresses with less likelihood of failure, and are therefore a bit more trustworthy in truly mission-critical applications.

Which One Should I Use: GLC-T vs GLC-TE vs SFP-GE-T

In terms of Cisco original GLC-T vs GLC-TE vs SFP-GE-T transceivers, GLC-T and SFP-GE-T will be End-of-Sale in June 1, 2017 and replaced by the GLC-TE. So then you can only buy GLC-TE transceivers from Cisco. If you’re dealing directly with a company like a telecom who specifically requires NEBS compliance, they’ll let you know and you should choose SFP-GE-T. But for the most of the networks, GLC-T and GLC-TE transceivers are all you’d need for Gigabit Ethernet, and they cost less as well. Fiberstore (FS.COM) provides all these three SFP modules. We are manufactured to the exact same standards as Cisco’s own brand, and come with true lifetime warranties. Every SFP module in Fiberstore was tested to ensure 100% compatibility, but only cost a small fraction of name-brand alternatives.

Cisco Systems, Inc. is an American multinational corporation headquartered in San Jose, California, that designs, manufactures, and sells networking equipment. With the rapid development of optical communication, Cisco’s products of optical networking are being used more and more widely all around the world. Among them, the SFP transceiver module is a critical component. In this article, Cisco SFP will be introduced.

Cisco Products Refer To Optical Communication

In fact, Cisco produces many optical networking equipment, such as optical services modules, optical transponders, optical transceiver modules and a comprehensive portfolio of WDM transmission modules, which includes optical terminal filters, optical amplifiers, optical service channel, and others, to support the network applications of enterprise and service provider customers.

Cisco SFP Transceiver Modules

Cisco SFP transceiver modules support Ethernet, Sonet/SDH and Fibre Channel applications across all Cisco switching and routing platforms. The Cisco portfolio of hot pluggable interfaces offers a rich set of choices in terms of speeds, protocols, reaches and supported transmission media. Generally, these SFP transceiver modules are divided into three types as following three sorts:

Operates on 50m multimode fiber links up to 550m and on 62.5 m FDDI-grade multimode fibers up to 220m.

Cisco 1000BASE-LX/LH SFP

GLC-LH-SM

Operates on standard single-mode fiber-optic link spans of up to 10 km and up to 550 m on any multimode fibers.

Cisco 1000BASE-ZX SFP

GLC-ZX-SM

Operates on standard single-mode fiber-optic link spans of up to approximately 70 km in length.

Cisco 1000BASE-BX10-D & 1000BASE-BX10-U SFP

GLC-BX-D
GLC-BX-U

Operates on a single strand of standard single-mode fiber. A 1000BASE-BX10-D device is always connected to a 1000BASE-BX10-U device with a single strand of standard single-mode fiber with an operating transmission range up to 10 km.